Abstract
We demonstrate radio-over-fiber (RoF) systems for IEEE 802.11a wireless local area network (WLAN) using Si avalanche photodetectors (APDs) fabricated in 0.18 μm standard complementary metal-oxide-semiconductor (CMOS) process. In order to achieve high optic-to-electric conversion efficiency and low-noise characteristics, the APD bias voltage is optimized with the evaluation of error vector magnitude (EVM). Downlink data transmission of 20 Mb/s, 16 quadrature amplitude modulation data at 5.805 GHz with a wireless link is successfully performed.
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